mirror of
https://github.com/cc65/cc65.git
synced 2024-11-17 09:07:32 +00:00
22 lines
306 B
ArmAsm
22 lines
306 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 02.06.1998
|
|
;
|
|
; int isdigit (int c);
|
|
;
|
|
|
|
.export _isdigit
|
|
.include "ctype.inc"
|
|
|
|
_isdigit:
|
|
cpx #$00 ; Char range ok?
|
|
bne @L1 ; Jump if no
|
|
tay
|
|
lda __ctype,y ; Get character classification
|
|
and #CT_DIGIT ; Mask digit bit
|
|
rts
|
|
|
|
@L1: lda #$00 ; Return false
|
|
tax
|
|
rts
|
|
|